Diketopyrrolopyrrole (DPP)-Based Donor-Acceptor Polymers for Selective Dispersion of Large-Diameter Semiconducting Carbon Nanotubes

Small ◽  
2015 ◽  
Vol 11 (24) ◽  
pp. 2946-2954 ◽  
Author(s):  
Ting Lei ◽  
Ying-Chih Lai ◽  
Guosong Hong ◽  
Huiliang Wang ◽  
Pascal Hayoz ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Large Diameter ◽  
Donor Acceptor

Improving Photocurrent Generation: Supramolecularly and Covalently Functionalized Single-Wall Carbon Nanotubes-Polymer/Porphyrin Donor-Acceptor Nanohybrids

2008 ◽  
Vol 14 (29) ◽  
pp. 8837-8846 ◽  
Author(s):  
G. M. Aminur Rahman ◽  
Anna Troeger ◽  
Vito Sgobba ◽  
Dirk M. Guldi ◽  
Norbert Jux ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Photocurrent Generation ◽  
Donor Acceptor

Effect of ozone exposure on the electrical characteristics of high-purity, large-diameter semiconducting carbon nanotubes

2014 ◽  
Vol 16 (22) ◽  
pp. 10861-10865 ◽  
Author(s):  
Jia Gao ◽  
Yueh-Lin Loo
Keyword(s):  
Carbon Nanotubes ◽  
High Purity ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Large Diameter ◽  
Ozone Exposure ◽  
Electrical Characteristics

Presorted, semiconducting carbon nanotubes in the channels of field-effect transistors undergo simultaneous p-doping and oxidation during ozone exposure.

Effects of the Molecular Weight of PCz on Selective Extraction of Large-Diameter Semiconducting Single-Walled Carbon Nanotubes

2021 ◽  
Vol 69 ◽  
pp. 11-21
Author(s):  
Ping Zhang ◽  
Wen Hui Yi ◽  
Bai Lei ◽  
Jin Feng Zhou ◽  
Yi Long Tian ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
Arc Discharge ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Selective Extraction ◽  
High Yield ◽  
Extraction Technology ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Due to the difficulty in the selective synthesis of semiconductor (s-) and metal (m-) single-walled carbon nanotubes (SWCNTs), we still need to explore the selective extraction technology of s-SWCNTs. Using Poly[9-(1-octylonoyl)-9H-carbazole-2,7-diyl] (PCz) extraction of s-SWCNTs has attracted extensive attention in recent years, because it can selective extraction of large-diameter s-SWCNTs with high purity. However, influence of the molecular weight of this polymer on the s-SWCNTs selective extraction properties remains unclear. In this study, we used PCz with different average molecular weights to study the ability of selective extraction s-SWCNTs from pristine arc discharge carbon nanotubes. Spectra studies indicate that compared to the PCz with lower molecular weight, the PCz with higher molecular weight has better selective extraction ability, and can help to obtain s-SWCNTs with higher purity (>99%) and high yield. FETs devices have been prepared by s-SWCNTs obtained via PCz with higher molecular weight exhibit higher on/off ratio, lower off current and lower subthreshold swing. This work offers a reference of the design and synthesis of PCz polymer that performs sufficient selective ability in extracting s-SWCNTs with promising applications.

scholarly journals Light-Induced Sulfur Transport inside Single-Walled Carbon Nanotubes

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 818 ◽  
Author(s):  
Olga Sedelnikova ◽  
Olga Gurova ◽  
Anna Makarova ◽  
Anastasiya Fedorenko ◽  
Anton Nikolenko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Functional Properties ◽  
Single Walled Carbon Nanotubes ◽  
Acceptor Interaction ◽  
Local Composition ◽  
X Ray ◽  
Single Walled Carbon ◽  
Before And After ◽  
Donor Acceptor ◽  
Walled Carbon Nanotubes

Filling of single-walled carbon nanotubes (SWCNTs) and extraction of the encapsulated species from their cavities are perspective treatments for tuning the functional properties of SWCNT-based materials. Here, we have investigated sulfur-modified SWCNTs synthesized by the ampoule method. The morphology and chemical states of carbon and sulfur were analyzed by transmission electron microscopy, Raman scattering, thermogravimetric analysis, X-ray photoelectron and near-edge X-ray absorption fine structure spectroscopies. Successful encapsulation of sulfur inside SWCNTs cavities was demonstrated. The peculiarities of interactions of SWCNTs with encapsulated and external sulfur species were analyzed in details. In particular, the donor–acceptor interaction between encapsulated sulfur and host SWCNT is experimentally demonstrated. The sulfur-filled SWCNTs were continuously irradiated in situ with polychromatic photon beam of high intensity. Comparison of X-ray spectra of the samples before and after the treatment revealed sulfur transport from the interior to the surface of SWCNTs bundles, in particular extraction of sulfur from the SWCNT cavity. These results show that the moderate heating of filled nanotubes could be used to de-encapsulate the guest species tuning the local composition, and hence, the functional properties of SWCNT-based materials.

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